Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ewa Niemierko, M.D.

Hematology & Oncology Physician in Concord, MA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1447233549

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Registry record

Entity type Individual (Type 1)

Name Ewa Niemierko

Credential M.D.

Sex Female

Practice address 131 Ornac, John Cumming Bldg #200, Concord, MA, 01742

Phone (978) 287-3436

Fax (978) 287-3642

Enumeration date Nov 22, 2005

Last updated in NPPES Oct 2, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 160258 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
J22840	Other	MA	BLUE CROSS BLUE SHIELD
14512	Other	MA	HARVARD PILGRIM
2554249	Other	MA	AETNA US HEALTH
B20992701	Other	MA	CIGNA
0121746	Medicaid	MA	-
408304	Other	MA	TUFTS HEALTH CARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Ewa Niemierko practice?

The practice location on file with NPPES is in Concord, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Ewa Niemierko?

The National Provider Identifier (NPI) for Ewa Niemierko is 1447233549, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-02.